Beyschlag, W; Wittmann, M; Jentsch, A; Steinlein, T: Soil crusts and disturbance benefit plant germination, establishment and growth on nutrient deficient sand, Basic and Applied Ecology, 9(3), 243-252 (2008), doi:10.1016/j.baae.2007.03.002
The influence of cyanobacterial soil crusts combined with mechanical soil disturbance on germination, establishment, growth and nutrition of Lepidium sativum seedlings on nutrient poor sand was analyzed under controlled conditions in a growth chamber. Marked release of nitrate and ammonia into the soil was only found in established and older (aging) crusts. Analyses of the 15N signatures of the crust and the seedling biomass revealed, that there was clear evidence that the established seedlings took up considerable amounts of the released nitrogen. This positively affected plant performance. Mechanical disturbance of the crust led to a temporal increase of nitrogen release but later to a considerable decrease of the released nitrogen components. Undisturbed crusts had a low stimulating effect on seed germination. In contrast and independent of the presence or absence of crusts mechanical soil disturbance led to significantly higher seed germination rates. It is concluded that the occurrence of small-scale disturbance events of moderate intensity at an intermediate frequency, which is the typical disturbance regime in many natural soil crust habitats, seems to be necessary for the successful coexistence of crust organisms and higher plants in nutrient poor environments.
Aktuelle Termine

Fr. 10.07.2020 aktuell
12th BayCEER Workshop 2020: "Call for Abstracts" geöffnet
Do. 22.10.2020
Extreme redox oscillations in freshwater re-flooded acid sulfate soil wetlands: Effects on Fe, S, and trace metals geochemical behavior
Do. 29.10.2020
Dissolved organic matter quality in differently managed forest ecosystems
Do. 05.11.2020
Signaling of rhizosphere microbiome: key for plant health, development and nutrition
Do. 29.10.2020
Neuer Termin: BayCEER Workshop 2020
BayCEER Blog
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
Picky carnivorous plants?
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 970.7 hPa
Lufttemperatur: 24.0 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 4.1 km/h
Wind (Max.): 12.2 km/h
Windrichtung: O

Globalstrahlung: 386 W/m²
Lufttemperatur: 21.9 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: 2 h/d
Wind (Höhe 32m): 0.0 km/h

Diese Webseite verwendet Cookies. weitere Informationen